WO2017028644A1 - 一种mtc ue随机接入的方法及装置 - Google Patents

一种mtc ue随机接入的方法及装置 Download PDF

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Publication number
WO2017028644A1
WO2017028644A1 PCT/CN2016/089643 CN2016089643W WO2017028644A1 WO 2017028644 A1 WO2017028644 A1 WO 2017028644A1 CN 2016089643 W CN2016089643 W CN 2016089643W WO 2017028644 A1 WO2017028644 A1 WO 2017028644A1
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Prior art keywords
level
mtc
network side
prach resource
indicated
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PCT/CN2016/089643
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English (en)
French (fr)
Inventor
许芳丽
刘建华
李心宇
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电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to JP2018507692A priority Critical patent/JP6609037B2/ja
Priority to KR1020187007340A priority patent/KR102055657B1/ko
Priority to EP16836508.8A priority patent/EP3337276A4/en
Priority to US15/752,890 priority patent/US10660134B2/en
Publication of WO2017028644A1 publication Critical patent/WO2017028644A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/006Transmission of channel access control information in the downlink, i.e. towards the terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • H04W16/26Cell enhancers or enhancement, e.g. for tunnels, building shadow

Definitions

  • the present invention relates to the technical field, and in particular, to a method and an apparatus for random access of an MTC UE.
  • MTC terminal may have some of the characteristics of M2M (Machine to Machine) communication characteristics, such as low mobility, small amount of transmitted data, insensitivity to communication delay, and extremely low requirements. Features such as power consumption.
  • M2M Machine to Machine
  • a new type of terminal will be defined, and both uplink and downlink support only 1.4 MHz radio frequency bandwidth.
  • the radio link fails to initiate RRC connection reestablishment (also one of the initial access);
  • the handover process requires random access
  • non-contention random access For the case of downlink data arrival and handover, if there is a dedicated preamble preamble, non-contention random access can be used.
  • the process of non-contention random access is as shown in Figure 1, and is mainly divided into three steps:
  • Step 1 the base station sends a message Msg0 to the UE;
  • the base station allocates a dedicated ra-Preamble Index (Random Acelless Preamble Index) for non-contention random access and a PRACH (Physical Random Access Channel) to the UE.
  • the machine access channel) resource ra-PRACH-MaskIndex as shown in Table 1, is the value of ra-PRACH-MaskIndex.
  • the non-contention random access caused by the arrival of the downlink data uses the PDCELLH to carry the information, and the non-contention random access caused by the handover carries the information through the handover command handover command, and is sent to the UE through the message Msg0.
  • Step 2 The UE sends a message Msg1 to the base station.
  • the UE sends the designated dedicated preamble to the base station on the designated PRACH resource according to the ra-PreambleIndex and the ra-PRACH-MaskIndex indicated by the Msg0.
  • the base station calculates the uplink timing advance TA according to Msg1.
  • Step 3 The base station sends the Msg2 to the UE.
  • the base station sends a random access response to the UE through the Msg2, and the random access response includes timing advance information, and notifies the UE of the timing advance of the subsequent uplink transmission.
  • Step 1 The UE sends a message Msg1 to the base station.
  • the UE selects the random access preamble and the PRACH resource, and uses the PRACH resource to send the selected random access preamble to the base station through the Msg1.
  • Step 2 The base station sends a message Msg2 to the UE.
  • the base station receives the preamble, calculates the timing advance TA, and sends a random access response to the UE through the Msg2, where the random access response includes at least the timing advance information and the uplink scheduling grant UL grant information for the Msg3.
  • Step 3 The UE sends a message Msg3 to the base station.
  • the uplink transmission is performed by the Msg3 on the UL grant specified by the Msg2.
  • the content of the Msg3 uplink transmission is different for different random access reasons. For example, for the initial access, the Msg3 transmits an RRC connection establishment request.
  • Step 4 The base station sends a message Msg4 to the UE.
  • Msg4 is a contention resolution message, and the UE can judge whether the random access is successful according to Msg4.
  • the network side may also trigger the UE to directly initiate the competitive random access by using the Msg0 message, where ra -PreambleIndex is specifically set to 000000.
  • the scheduling signaling of the message in each step and the message itself and the corresponding feedback information need to be repeatedly transmitted.
  • the same type of message has different transmission repetition times under different coverage enhancement levels CE LEVEL. Therefore, it is confirmed at RAN2#90 that the transmission resource (PRACH resource) of Msg1 of different CE LEVEL is different in the transmission for Msg1, and the UE can judge according to the current situation (such as radio resource management RRM measurement, etc.).
  • the CE LEVEL where the UE is currently located, and then the CE LEVEL is used to select the PRACH resource for the transmission of the Msg1.
  • the UE For the random access procedure sent by the UE itself, if the preamble transmission success rate of the same CE LEVEL reaches the pre-configured transmission frequency, the UE still needs to increase the CE LEVEL by one level, and select a higher level CE LEVEL PRACH. Resources are transferred.
  • the PRACH resource used by the UE to initiate random access is related to the current CE LEVEL of the UE; and the network side triggers the UE to initiate random access.
  • the PRACH resource is determined by the network side. Since the network side triggering the UE to initiate the random access procedure is mainly applicable to the downlink data arrival or handover process, the unified feature of the two processes is that there is no data transmission or no data transmission between the UE and the target eNB for a long time. In the case that there is no data transmission for a long time, it is difficult for the network side eNB to know the current CE LEVEL of the UE in time and accurately. In this case, there is no clear way for the UE to perform PRACH resource selection.
  • the present invention provides a method and apparatus for random access of an MTC UE, and provides a mechanism for selecting a PRACH resource when the network side triggers the MTC UE to initiate a non-contention random access CFRA procedure.
  • the present invention provides a method for random access of a device-type communication user equipment MTC UE, including:
  • indication information sent by the network side where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • Random access is performed on the PRACH resource corresponding to the selected CE LEVEL.
  • the receiving the indication information sent by the network side includes:
  • selecting a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determining the PRACH resource corresponding to the CE LEVEL specifically includes:
  • the CE LEVEL indicated by the network side includes the CE LEVEL of the MTC UE, the CE LEVEL of the MTC UE is selected;
  • the indication information is used to indicate each CE LEVEL and its corresponding PRACH resource.
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • Selecting a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determining the PRACH resource corresponding to the CE LEVEL specifically includes:
  • a CE LEVEL whose coverage gain is closest to the CE LEVEL of the MTC UE is selected from a plurality of CE LEVELs indicated by the network side;
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • Selecting a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determining the PRACH resource corresponding to the CE LEVEL specifically includes:
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • Selecting a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determining the PRACH resource corresponding to the CE LEVEL specifically includes:
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • Selecting a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determining the PRACH resource corresponding to the CE LEVEL specifically includes:
  • the CE LEVEL indicated by the network side is selected;
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • Selecting a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determining the PRACH resource corresponding to the CE LEVEL specifically includes:
  • the CE LEVEL indicated by the network side is not the CE LEVEL of the MTC UE, and the coverage gain of the CE LEVEL of the MTC UE is better than the CE LEVEL indicated by the network side, the CE LEVEL indicated by the network side is selected;
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • Selecting a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determining the PRACH resource corresponding to the CE LEVEL specifically includes:
  • the CE LEVEL of the MTC UE is selected when the CE LEVEL indicated by the network side is not the CE LEVEL of the MTC UE, and the coverage gain of the CE LEVEL of the MTC UE is worse than the CE LEVEL indicated by the network side;
  • the method further includes:
  • the PRACH resource corresponding to the CE LEVEL indicated by the network side is determined according to the CE LEVEL of the transition, and non-contention random access is initiated on the PRACH resource, otherwise, according to the competition
  • the random access resource selection mechanism selects a PRACH resource and initiates a contention random access.
  • the indication information indicates each CE LEVEL and its corresponding PRACH resource in any of the following manners:
  • each CE LEVEL and its corresponding PRACH resource combination a combination index of each CE LEVEL and its corresponding PRACH resource combination, where each CE LEVEL and its corresponding PRACH resource are pre-configured or agreed upon by the protocol, and a combination index corresponding to each combination is pre-configured or agreed upon;
  • each CE LEVEL and its corresponding PRACH mask index are indicated, wherein the preamble index corresponding to each CE LEVEL is pre-configured.
  • the invention also provides a method for triggering random access of an MTC UE by a network side, including:
  • the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • the sending the indication information to the MTC UE includes:
  • the indication information is sent to the MTC UE by using a physical downlink control channel PDCCH order.
  • the indication information is used to indicate each CE LEVEL of the protocol and its corresponding PRACH resource; or
  • the indication information is used to indicate multiple CE LEVELs of the protocol and their corresponding PRACH resources; or
  • the indication information is used to indicate a CE LEVEL of the protocol and its corresponding PRACH resource.
  • the indication information indicates each CE LEVEL and its corresponding PRACH resource in any of the following manners:
  • each CE LEVEL and its corresponding PRACH resource combination a combination index of each CE LEVEL and its corresponding PRACH resource combination, where each CE LEVEL and its corresponding PRACH resource are pre-configured or agreed upon by the protocol, and a combination index corresponding to each combination is pre-configured or agreed upon;
  • each CE LEVEL and its corresponding PRACH mask index are indicated, wherein the preamble index corresponding to each CE LEVEL is pre-configured.
  • the present invention provides a machine type communication user equipment MTC UE, including:
  • a receiving unit configured to receive indication information sent by the network side, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • a selecting unit configured to select a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determine a PRACH resource corresponding to the CE LEVEL;
  • the random access unit is configured to perform random access on the PRACH resource corresponding to the selected CE LEVEL.
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, which specifically includes:
  • the CE LEVEL indicated by the network side includes the CE LEVEL of the MTC UE, the CE LEVEL of the MTC UE is selected;
  • the indication information is used to indicate each CE LEVEL and its corresponding PRACH resource.
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • a CE LEVEL whose coverage gain is closest to the CE LEVEL of the MTC UE is selected from a plurality of CE LEVELs indicated by the network side;
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • the selecting unit selects one from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side.
  • CE LEVEL and determine the PRACH resource corresponding to the CE LEVEL including:
  • the CE LEVEL indicated by the network side is selected;
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the CE LEVEL indicated by the network side is not the CE LEVEL of the MTC UE, and the coverage gain of the CE LEVEL of the MTC UE is better than the CE LEVEL indicated by the network side, the CE LEVEL indicated by the network side is selected;
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the CE LEVEL of the MTC UE is selected when the CE LEVEL indicated by the network side is not the CE LEVEL of the MTC UE, and the coverage gain of the CE LEVEL of the MTC UE is worse than the CE LEVEL indicated by the network side;
  • the PRACH resource corresponding to the selected CE LEVEL is further used for:
  • the PRACH resource corresponding to the CE LEVEL indicated by the network side is determined according to the CE LEVEL of the transition, and non-contention random access is initiated on the PRACH resource, otherwise, according to the competition
  • the random access resource selection mechanism selects a PRACH resource and initiates a contention random access.
  • the indication information indicates each CE LEVEL and its corresponding PRACH resource in any of the following manners:
  • each CE LEVEL and its corresponding PRACH resource combination a combination index of each CE LEVEL and its corresponding PRACH resource combination, where each CE LEVEL and its corresponding PRACH resource are pre-configured or agreed upon by the protocol, and a combination index corresponding to each combination is pre-configured or agreed upon;
  • each CE LEVEL and its corresponding PRACH mask index are indicated, wherein the preamble index corresponding to each CE LEVEL is pre-configured.
  • the present invention further provides a network side device that triggers random access of an MTC UE, including:
  • the indication unit is configured to send, to the MTC UE, indication information, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • a receiving unit configured to receive a random access initiated by the MTC UE on the PRACH resource corresponding to the selected CE LEVEL.
  • the indication information indicated by the indication unit is used to indicate each CE LEVEL of the protocol and its corresponding PRACH resource; or
  • the indication information indicated by the indication unit is used to indicate multiple CE LEVELs of the protocol and their corresponding PRACH resources; or
  • the indication information indicated by the indication unit is used to indicate a CE LEVEL of the protocol and its corresponding PRACH resource.
  • the indicating unit indicates each CE LEVEL and its corresponding PRACH resource in any of the following manners:
  • each CE LEVEL and its corresponding PRACH resource combination a combination index of each CE LEVEL and its corresponding PRACH resource combination, where each CE LEVEL and its corresponding PRACH resource are pre-configured or agreed upon by the protocol, and a combination index corresponding to each combination is pre-configured or agreed upon;
  • each CE LEVEL and its corresponding PRACH mask index are indicated, wherein the preamble index corresponding to each CE LEVEL is pre-configured.
  • the MTC UE selects the CE LEVEL of the MTC UE according to the MTC UE according to the CE LEVEL specified by the network side and its corresponding PRACH resource.
  • a CE LEVEL and a corresponding PRACH resource are used to initiate a random access procedure, thereby solving the problem of how the UE selects the PRACH resource for random access when the network side triggers the UE to initiate random access.
  • FIG. 1 is a schematic diagram of a non-contention random access procedure in the prior art
  • FIG. 2 is a schematic diagram of a competitive random access procedure in the prior art
  • FIG. 3 is a flowchart of a method for random access of an MTC UE according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for triggering random access of an MTC UE by a network side according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of an MTC UE according to an embodiment of the present invention.
  • FIG. 6 is a structural diagram of another MTC UE according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of a network side device for triggering random access of an MTC UE according to an embodiment of the present invention.
  • FIG. 8 is a structural diagram of a base station according to an embodiment of the present invention.
  • the present invention provides a method for randomly accessing a device type communication user equipment MTC UE on a network side and a method for random access of an MTC UE, which mainly includes the following steps:
  • Step 1 The network side sends indication information to the MTC UE, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • the network side When the network side triggers the UE to initiate the non-contention random access process, the network side allocates the PRACH resource to the UE.
  • the network side may indicate at least one CE LEVEL and its corresponding PRACH resource to the MTC UE.
  • the network side may, but is not limited to, send the indication information to the MTC UE by using a physical downlink control channel PDCCH order (PDCCH order).
  • PDCCH order a physical downlink control channel
  • the PDCCH order on the network side includes the CE LEVEL of the corpus or partial subset of the protocol convention and its corresponding PRACH resources.
  • Step 2 The MTC UE receives the indication information sent by the network side, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource.
  • the MTC UE receives the indication information sent by the network side through the PDCCH order.
  • Step 3 The MTC UE selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines a PRACH resource corresponding to the CE LEVEL.
  • the UE may determine the CE LEVEL where the UE is currently located according to the current situation (for example, RRM measurement, etc.), and the network side also indicates the PRACH resource of the at least one CE LEVEL, and the UE may select a CE LEVEL according to a certain mechanism, and determine The PRACH resource corresponding to the CE LEVEL.
  • Step 4 Initiating random access in the PRACH resource corresponding to the selected CE LEVEL.
  • Step 5 The network side receives the random access initiated by the MTC UE on the PRACH resource corresponding to the selected CE LEVEL.
  • CE LEVEL of the MTC UE Preferably, from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, the following mechanism is used to select a CE LEVEL:
  • Determining the selected CE LEVEL according to whether the CE LEVEL of the MTC UE currently described by the MTC UE is included in the CE LEVEL indicated by the network side.
  • the MTC UE determines that the CE LEVEL of the current MTC UE includes the CE LEVEL indicated on the network side.
  • the MTC UE selects the CE LEVEL of the MTC UE, selects the PRACH resource corresponding to the CE LEVEL indicated by the network side according to the CE LEVEL of the MTC UE, and initiates a non-contention random access CFRA procedure in the corresponding PRACH resource.
  • the MTC UE selects the MTC UECE LEVEL, and determines a PRACH resource of the CECVEL of the MTC UE to initiate a contention random access CBRA process according to the contending random access resource selection mechanism;
  • the MTC UE selects one CE LEVEL whose coverage gain is closest to the MTC UECE LEVEL from the plurality of CE LEVELs indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL indicated by the network side according to the selected CE LEVEL.
  • the PRACH resource initiates CFRA;
  • CE LEVELs have different coverage gains, and the selected coverage gain is closest to the CE LEVEL CE LEVEL of the MTC UE, which may be better than the CE LEVEL coverage gain of the MTC UE, or may be CE LEVEL than the MTC UE. Cover the gain difference.
  • a CE LEVEL that is closer to the CE LEVEL coverage gain of the MTC UE and closest to the MTC UECE LEVEL may be selected.
  • the MTC UE determines whether to select the CE LEVEL of the MTC UE or the CE LEVEL specified by the network side according to the case where the coverage gain of the CE LEVEL of the MTC UE is higher or lower than the CE LEVEL indicated by the network side.
  • CE LEVELs indicated by the network side do not include the CE LEVEL of the MTC UE, and the coverage gain of the CE LEVEL of the MTC UE is better than all CE LEVELs indicated by the network side, multiple CEs indicated from the network side A CE LEVEL is selected in the LEVEL; the PRACH resource corresponding to the CE LEVEL indicated by the network side is determined according to the selected CE LEVEL.
  • the network side indicates each CE LEVEL and its corresponding PRACH resources agreed by the protocol through the PDCCH order
  • the CE LEVEL of the MTC UE of the MTC UE must be included in the CE LEVEL indicated by the network side, so the CE LEVEL of the MTC UE is selected to be used.
  • the network side indicates multiple CE LEVELs and their corresponding PRACH resources through the PDCCH order indication protocol
  • the network side may indicate all CE LEVEL or part of CE LEVEL.
  • the CE LEVEL of the MTC UE of the MTC UE is included in the CE LEVEL indicated by the network side.
  • the MTC UE selects to use the CE LEVEL of the MTC UE; determines the PRACH resource corresponding to the CE LEVEL indicated by the network side according to the CE LEVEL of the MTC UE, sends the Msg1 on the PRACH resource, and determines the CE LEVEL of the current RACH process.
  • Other configurations include:
  • the PRACH resource initiates a contention random access in the corresponding PRACH resource.
  • one CE LEVEL is selected from the plurality of CE LEVELs indicated by the network side; and the CE LEVEL indicated by the network side is determined according to the selected CE LEVEL.
  • Corresponding PRACH resources Sending Msg1 on the PRACH resource, and obtaining other RACH related configurations of the corresponding CE LEVEL according to the CE LEVEL.
  • the CE LEVEL covering the gain of the CE LEVEL closest to the MTC UE may be selected.
  • the network side indicates a CE LEVEL and its corresponding PRACH resource by the PDCCH order indication protocol
  • Case 1 When one CE LEVEL indicated by the network side is the CE LEVEL of the MTC UE, the CE LEVEL of the MTC UE is selected to be used; and the CE LEVEL corresponding to the CE LEVEL indicated by the network side is determined according to the CE LEVEL of the MTC UE.
  • the resource sends Msg1 on the PRACH resource and determines other configurations of CE LEVEL for this RACH process.
  • the CE LEVEL indicated by the network side is selected, and the Msg1 is sent on the PRACH resource according to the PRACH resource corresponding to the CE LEVEL indicated by the network side, and Determine other configurations of CE LEVEL for this RACH process; or
  • the method further includes:
  • the PRACH resource corresponding to the CE LEVEL indicated by the network side is determined according to the CE LEVEL of the transition, and non-contention random access is initiated on the PRACH resource, otherwise, according to the competition
  • the random access resource selection mechanism selects a PRACH resource and initiates a contention random access.
  • the indication information sent by the network side indicates each CE LEVEL and its corresponding PRACH resource in any of the following manners:
  • Mode 1 indicating an index of each CE LEVEL and its corresponding preamble index preamble index and PRACH mask index PRACH mask index;
  • Mode 2 indicating a combined index of each CE LEVEL and its corresponding PRACH resource combination, where each CE LEVEL and its corresponding PRACH resource combination are pre-configured or agreed upon, and pre-configured or agreed upon by a combination of each combination index;
  • Mode 3 indicating an index of each CE LEVEL and its corresponding PRACH mask index, where the preamble index corresponding to each CE LEVEL is pre-configured.
  • the following is a method for randomly accessing a device-type communication user equipment MTC UE from the terminal side, as shown in FIG. 3, including:
  • Step 301 Receive indication information sent by the network side, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • Step 302 Select a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determine a PRACH resource corresponding to the CE LEVEL.
  • Step 303 Initiate random access in the PRACH resource corresponding to the selected CE LEVEL.
  • the following is a method for triggering random access of an MTC UE on the network side, as shown in FIG. 4, which includes:
  • Step 401 Send indication information to the MTC UE, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • Step 402 Receive random access initiated by the MTC UE on the PRACH resource corresponding to the selected CE LEVEL.
  • the PDCCH order sent by the ENB carries each CE LEVEL of the protocol and its corresponding PRACH resource.
  • the network side indicates three CE LEVELs and their corresponding PRACH resources to the UE, and the PDCCH order carries the PRACH mask index and the preamble index of each CE LEVEL;
  • the UE obtains the current CE LEVEL according to the current measurement, obtains the corresponding PRACH mask index and the preamble according to the CE LEVEL, performs RACH transmission according to the information, and performs subsequent transmission according to the CE LEVEL;
  • the UE automatically transitions to the CE LEVEL of the upper layer, and then finds the PRACH mask index and the preamble index given in the PDCCH order according to the CE LEVEL, and initiates a non-contention random connection.
  • the process CFRA process.
  • the PDCCH order sent by the ENB carries a dedicated PRACH resource of one CE LEVEL.
  • the network indicates a CE LEVEL PRACH resource to the UE
  • the UE initiates CFRA according to the PRACH resource configured by the network and the corresponding CE LEVEL;
  • the UE automatically transitions to the CE LEVEL of the higher layer (and can also initiate the CBRA based on its current real CE LEVEL).
  • the PDCCH order sent by the ENB carries a dedicated PRACH resource of one CE LEVEL.
  • the network indicates a CE LEVEL PRACH resource to the UE
  • the current CE LEVEL of the UE is better than the CE LEVEL indicated by the network, and the CFRA is initiated by using the PRACH resource corresponding to the CE LEVEL indicated by the network.
  • the PDCCH order sent by the ENB carries a dedicated PRACH resource of one CE LEVEL.
  • the network indicates a CE LEVEL PRACH resource to the UE
  • the current CE LEVEL of the UE is worse than the CE LEVEL indicated by the network, and the CBRA is initiated according to the UE's current CE LEVEL.
  • an indication manner indicating multiple CE LEVELs in the PDCCH order is used.
  • the index indicating each CE LEVEL and its corresponding preamble index and PRACH mask index may be used in any of the following methods:
  • CE LEVEL corresponding to each PRACH MASK INDEX and preamble index combination. It can correspond to one CE LEVEL or multiple CE LEVELs. Another way is to give a combination of PRACH MASK INDEX and preamble index corresponding to CE LEVEL, which can be a combination or multiple combinations.
  • the CE LEVEL field may be added to the PDCCH DCI format of the PDCCH order, indicating which CE LEVEL or several CE LEVELs corresponding to the PRACH Mask index and the preamble index in the PDCCH order; for example, introducing 2 bits, such as Table 2 or Table 3 is shown.
  • the code points of multiple bits represent the indicated CE LEVEL and its corresponding preamble index and PRACH Mask index.
  • the corresponding PRACH resource is found in the existing standard table according to the PRACH mask index corresponding to the indicated CE LEVEL.
  • the table of the PRACH Mask index contains CE LEVEL, which identifies the value of the PRACH Mask index available in the table of the PRACH Mask index corresponding to each CE LEVEL.
  • the current 16 code points are expanded to 64 or 48, corresponding to information of 4 CE LEVEL (including CE LEVEL0) or 3 CE LEVEL (excluding CE LEVEL 0).
  • CE LEVEL indication method in the DCI format is embedded in the mask index table, that is, the value of each PRACH Mask index is increased to indicate that the PRACH Mask index and the preamble index correspond to Which CE LEVEL is still a few CE LEVEL.
  • the resources of the relevant CE LEVEL can all be used for the UE to perform CFRA use.
  • the present invention provides a machine type communication user equipment MTC UE, as shown in FIG. 5, including:
  • the receiving unit 501 is configured to receive indication information that is sent by the network, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • the selecting unit 502 is configured to select a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determine a PRACH resource corresponding to the CE LEVEL;
  • the random access unit 503 is configured to perform random access on the PRACH resource corresponding to the selected CE LEVEL.
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, which specifically includes:
  • the CE LEVEL indicated by the network side includes the CE LEVEL of the MTC UE, the CE LEVEL of the MTC UE is selected;
  • the indication information is used to indicate each CE LEVEL and its corresponding PRACH resource.
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • a CE LEVEL whose coverage gain is closest to the CE LEVEL of the MTC UE is selected from a plurality of CE LEVELs indicated by the network side;
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the indication information is used to indicate multiple CE LEVELs and their corresponding PRACH resources;
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the CE LEVEL indicated by the network side is selected;
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the CE LEVEL indicated by the network side is not the CE LEVEL of the MTC UE, and the coverage gain of the CE LEVEL of the MTC UE is better than the CE LEVEL indicated by the network side, the CE LEVEL indicated by the network side is selected;
  • the indication information is used to indicate a CE LEVEL and its corresponding PRACH resource
  • the selecting unit selects a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determines the PRACH resource corresponding to the CE LEVEL, and specifically includes:
  • the CE LEVEL of the MTC UE is selected when the CE LEVEL indicated by the network side is not the CE LEVEL of the MTC UE, and the coverage gain of the CE LEVEL of the MTC UE is worse than the CE LEVEL indicated by the network side;
  • the PRACH resource corresponding to the selected CE LEVEL is further used for:
  • the PRACH resource corresponding to the CE LEVEL indicated by the network side is determined according to the CE LEVEL of the transition, and non-contention random access is initiated on the PRACH resource, otherwise, according to the competition
  • the random access resource selection mechanism selects a PRACH resource and initiates a contention random access.
  • the indication information indicates each CE LEVEL and its corresponding PRACH resource in any of the following manners:
  • each CE LEVEL and its corresponding PRACH resource combination a combination index of each CE LEVEL and its corresponding PRACH resource combination, where each CE LEVEL and its corresponding PRACH resource are pre-configured or agreed upon by the protocol, and a combination index corresponding to each combination is pre-configured or agreed upon;
  • each CE LEVEL and its corresponding PRACH mask index are indicated, wherein the preamble index corresponding to each CE LEVEL is pre-configured.
  • An embodiment of the present invention further provides an MTC UE, as shown in FIG. 6, including a processor 600, a transceiver 610, and a memory 620, where:
  • the processor 600 is configured to read a program in the memory 620, and perform the following process: receiving, by the transceiver 610, indication information sent by the network side, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical randomness Accessing the channel PRACH resource; selecting a CE LEVEL from the CE LEVEL of the MTC UE and the CE LEVEL indicated by the network side, and determining the PRACH resource corresponding to the CE LEVEL; and the PRACH resource corresponding to the selected CE LEVEL passes through the transceiver 610. Perform random access;
  • the transceiver 610 is configured to receive and transmit data under the control of the processor 600.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 620.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 610 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 630 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 in performing operations.
  • the present invention further provides a network side device that triggers random access of an MTC UE, as shown in FIG. 7, including:
  • the indication unit 701 is configured to send, to the MTC UE, indication information, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random access channel PRACH resource;
  • the receiving unit 702 is configured to receive random access initiated by the MTC UE on the PRACH resource corresponding to the selected CE LEVEL.
  • the indication information indicated by the indication unit is used to indicate each CE LEVEL of the protocol and its corresponding PRACH resource; or
  • the indication information indicated by the indication unit is used to indicate multiple CE LEVELs of the protocol and their corresponding PRACH resources; or
  • the indication information indicated by the indication unit is used to indicate a CE LEVEL of the protocol and its corresponding PRACH resource.
  • the indicating unit indicates each CE LEVEL and its corresponding PRACH resource in any of the following manners:
  • each CE LEVEL and its corresponding PRACH resource combination a combination index of each CE LEVEL and its corresponding PRACH resource combination, where each CE LEVEL and its corresponding PRACH resource are pre-configured or agreed upon by the protocol, and a combination index corresponding to each combination is pre-configured or agreed upon;
  • each CE LEVEL and its corresponding PRACH mask index are indicated, wherein the preamble index corresponding to each CE LEVEL is pre-configured.
  • An embodiment of the present invention further provides an evolved base station, as shown in FIG. 8, including a processor 800, a transceiver 810, and a memory 820, where:
  • the processor 800 is configured to read a program in the memory 820, and execute the following process: sending, by the transceiver 810, indication information to the MTC UE, where the indication information is used to indicate at least one coverage enhancement level CE LEVEL and its corresponding physical random connection Incoming channel PRACH resource; receiving, by the transceiver 810, random access initiated by the MTC UE on the PRACH resource corresponding to the selected CE LEVEL;
  • the transceiver 810 is configured to receive and transmit data under the control of the processor 800.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 800 and various circuits of memory represented by memory 820.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 810 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 in performing operations.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.

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Abstract

本发明提供一种MTC UE随机接入的方法及装置,该方法包括:接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;在选择的CE LEVEL对应的PRACH资源进行随机接入。本发明提供了一种在网络侧触发MTC UE发起非竞争随机接入CFRA过程时,如何选择PRACH资源的机制。

Description

一种MTC UE随机接入的方法及装置
本申请要求在2015年8月14日提交中国专利局、申请号为201510502961.7、发明名称为“一种MTC UE随机接入的方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及技术领域,尤其涉及一种MTC UE随机接入的方法及装置。
背景技术
1)MTC(Machine Type Communication,机器类通信)
随着物联网的兴起,在LTE(Long Term Evolution,长期演进)系统中支持MTC越来越受到重视。在3GPP Release 13立项了针对MTC的物理层增强项目。一台MTC设备(MTC终端)可能具有多种M2M(Machine to Machine,机器与机器)通信特性之中的部分特性,如低移动性、传输数据量小、对通信时延不敏感、要求极低功耗等特征。其中,为了降低MTC终端的成本,将新定义一种终端类型,其上行和下行均只支持1.4MHz射频带宽。
在现有网络中,运营商发现在有些场景下工作的终端,比如工作于地下室、商场或者建筑角落的终端,由于无线信号被严重遮挡,信号受到很大的衰减,无法与网络进行通信,而针对这些场景下进行网络的深度覆盖会大大增加网络的建网成本。经过测试,认为需要对现有覆盖进行一定程度的增强。实现覆盖增强,一种较为可行的方法是需要对现有信道采用重复传输或类似技术,理论上可以通过对现有物理信道进行几十次至几百次重复传输获得一定程度的覆盖增益。
2)LTE系统中的随机接入机制
在LTE系统中随机接入的原因主要有如下几种:
从无线资源控制空闲RRC_IDLE状态接入(也称为初始接入,initial acelless);
无线链路失败发起RRC连接重建(也是初始接入的一种);
切换过程需要随机接入;
UE处于RRC连接态(RRC_CONNECTED)时有下行数据到达;
UE处于RRC_CONNECTED时有上行数据到达;
对于有下行数据到达和切换两种情况,如果有专用前导码preamble,则可以使用非竞争随机接入,非竞争随机接入的过程如下图1所示,主要分为三步:
步骤1,基站向UE发送消息Msg0;
基站向UE分配用于非竞争随机接入的专用ra-PreambleIndex(随机接入前导码索引,Random Acelless Preamble Index)以及PRACH(Physical Random Access Channel,物理随 机接入信道)资源ra-PRACH-MaskIndex,如表1所示为ra-PRACH-MaskIndex的取值。对于下行数据到达引起的非竞争随机接入使用PDCELLH携带这些信息,对于切换引起的非竞争随机接入通过切换命令handover command携带这些信息,通过消息Msg0发送给UE。
步骤2,UE向基站发送消息Msg1
UE根据Msg0指示的ra-PreambleIndex和ra-PRACH-MaskIndex,在指定的PRACH资源上向基站发送指定的专用preamble。基站接收到Msg1后根据Msg1计算上行定时提前量TA。
步骤3,基站向UE发送Msg2
基站通过Msg2向UE发送随机接入响应,随机接入响应中包含定时提前量信息,通知UE后续上行传输的定时提前量。
对于其它所有随机接入原因引起的随机接入均可以使用竞争随机接入,竞争随机接入的过程如下图2所示,主要分为四步:
步骤1,UE向基站发送消息Msg1
UE选择随机接入preamble和PRACH资源,并利用该PRACH资源通过Msg1向基站发送所选的随机接入preamble。
步骤2,基站向UE发送消息Msg2
基站接收到preamble,计算定时提前量TA,并通过Msg2向UE发送随机接入响应,随机接入响应中至少包含该定时提前量信息和针对Msg3的上行调度授权UL grant信息;
步骤3,UE向基站发送消息Msg3
UE在Msg2指定的UL grant上通过Msg3进行上行传输,不同随机接入原因Msg3上行传输的内容不同,比如对于初始接入,Msg3传输的是RRC连接建立请求;
步骤4,基站向UE发送消息Msg4
Msg4为竞争解决消息,UE根据Msg4可以判断随机接入是否成功。
在切换或下行数据到达时候,除了网络侧触发UE发起非竞争随机接入过程之外,当网络侧PRACH资源不足的时候,网络侧也可以通过Msg0消息触发UE直接发起竞争随机接入,其中ra-PreambleIndex特别设置为000000。
表1 PRACH Mask索引取值
Figure PCTCN2016089643-appb-000001
Figure PCTCN2016089643-appb-000002
3)低复杂度MTC(LC MTC)下的RACH(Random Access Channel,随机接入信道)传输机制
在进行覆盖增强传输时候,为了提高传输性能,需要进行多次重复传输。对于上述随机接入过程,每个步骤中的消息的调度信令和消息本身以及相应的反馈信息都需要进行重复传输。同一类消息在不同覆盖增强等级CE LEVEL下的传输重复次数需求是不同的。因此在RAN2#90会上确认了针对Msg1的传输中,不同CE LEVEL的Msg1的传输资源(PRACH资源)是不同的,且UE可以根据当前自己的情况(例如无线资源管理RRM测量等)来判断UE当前所处的CE LEVEL,然后通过CE LEVEL来进行PRACH资源的选择,用来进行Msg1的传输。
针对UE自行发送的随机接入过程,当同一个CE LEVEL的preamble传输成功率达到预配置的传输次数仍然没有成功,则UE需要将CE LEVEL增加一个等级,挑选更高一级的CE LEVEL的PRACH资源进行传输。
可见,在当前覆盖增强随机接入传输过程中,UE自行发起的随机接入使用的PRACH资源是和UE当前的CE LEVEL相关的;而网络侧触发UE发起随机接入的过程中的 PRACH资源则是由网络侧决定的。由于网络侧触发UE发起随机接入过程主要适用于下行数据到达或者切换过程,这两个过程的统一的特点是UE和目标eNB之间长时间没有数据传输或者从未有过数据传输。在长时间没有数据传输的情况下,网络侧eNB很难及时准确的获知UE当前的CE LEVEL。在这种情况下UE如何进行PRACH资源选择,还没有明确的方法。
发明内容
本发明提供一种MTC UE的随机接入的方法及装置,提供了一种在网络侧触发MTC UE发起非竞争随机接入CFRA过程时,如何选择PRACH资源的机制。
本发明提供一种机器类通信用户设备MTC UE随机接入的方法,包括:
接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;
在选择的CE LEVEL对应的PRACH资源进行随机接入。
优选地,接收网络侧发送的指示信息,具体包括:
接收网络侧通过物理下行控制信道PDCCH命令发送的指示信息。
优选地,从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的CE LEVEL包含所述MTC UE的CE LEVEL时,选择所述MTC UE的CE LEVEL;
根据所述MTC UE的CE LEVEL选择网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示每个CE LEVEL及其对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL时,从网络侧指示的多个CE LEVEL中,选择一个覆盖增益最接近所述MTC UE的CE LEVEL的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的所有的CE LEVEL时,选择所述MTC UECE LEVEL;
根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的所有的CE LEVEL时,从网络侧指示的多个CE LEVEL中选择一个CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL时,选择网络侧指示的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的CE LEVEL时,选择网络侧指示的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的CE LEVEL时,选择所述MTC UE的CE LEVEL;
根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
优选地,在选择的CE LEVEL对应的PRACH资源进行随机接入失败时,还包括:
自行跃迁到覆盖增益更高一级的CE LEVEL上;
确定跃迁的CE LEVEL的在网络侧指示的CE LEVEL中时,根据跃迁的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,并在该PRACH资源上发起非竞争随机接入,否则根据竞争随机接入资源选择机制选择PRACH资源,发起竞争随机接入。
优选地,所述指示信息采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
本发明还提供一种网络侧触发MTC UE随机接入的方法,包括:
向MTC UE发送指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
接收MTC UE在选择的CE LEVEL对应的PRACH资源上发起的随机接入。
优选地,向MTC UE发送指示信息,具体包括:
通过物理下行控制信道PDCCH命令向MTC UE发送指示信息。
优选地,所述指示信息用于指示协议约定的每个CE LEVEL及其对应的PRACH资源;或者
所述指示信息用于指示协议约定的多个CE LEVEL及其对应的PRACH资源;或者
所述指示信息用于指示协议约定的一个CE LEVEL及其对应的PRACH资源。
优选地,所述指示信息采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
本发明提供一种机器类通信用户设备MTC UE,包括:
接收单元,用于接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
选择单元,用于从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;
随机接入单元,用于在选择的CE LEVEL对应的PRACH资源进行随机接入。
优选地,所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的CE LEVEL包含所述MTC UE的CE LEVEL时,选择所述MTC UE的CE LEVEL;
根据所述MTC UE的CE LEVEL选择网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示每个CE LEVEL及其对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL时,从网络侧指示的多个CE LEVEL中,选择一个覆盖增益最接近所述MTC UE的CE LEVEL的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的所有的CE LEVEL时,选择所述MTC UE的CE LEVEL;
根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的所有的CE LEVEL时,从网络侧指示的多个CE LEVEL中选择一个CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一 个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL时,选择网络侧指示的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的CE LEVEL时,选择网络侧指示的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的CE LEVEL时,选择所述MTC UE的CE LEVEL;
根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
优选地,随机接入单元在选择的CE LEVEL对应的PRACH资源进行随机接入失败时,还用于:
自行跃迁到覆盖增益更高一级的CE LEVEL上;
确定跃迁的CE LEVEL的在网络侧指示的CE LEVEL中时,根据跃迁的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,并在该PRACH资源上发起非竞争随机接入,否则根据竞争随机接入资源选择机制选择PRACH资源,发起竞争随机接入。
优选地,所述指示信息采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
本发明还提供一种触发MTC UE随机接入的网络侧设备,包括:
指示单元,用于向MTC UE发送指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
接收单元,用于接收MTC UE在选择的CE LEVEL对应的PRACH资源上发起的随机接入。
优选地,所述指示单元指示的指示信息用于指示协议约定的每个CE LEVEL及其对应的PRACH资源;或者
所述指示单元指示的指示信息用于指示协议约定的多个CE LEVEL及其对应的PRACH资源;或者
所述指示单元指示的指示信息用于指示协议约定的一个CE LEVEL及其对应的PRACH资源。
优选地,所述指示单元采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
利用本发明提供的MTC UE的随机接入的方法及装置,具有以下有益效果:
当网络侧触发MTC UE发起非竞争随机接入CFRA过程的时候,MTC UE基于网络侧指定的CE LEVEL及其对应的PRACH资源的情况下,结合MTC UE所述MTC UE的CE LEVEL,从其中选择一个CE LEVEL并使用对应的PRACH资源发起随机接入过程,从而解决了网络侧触发UE发起随机接入时,UE如何选择PRACH资源进行随机接入的问题。
附图说明
图1为现有技术中非竞争随机接入过程示意图;
图2为现有技术中竞争随机接入过程示意图;
图3为本发明实施例提供的MTC UE随机接入方法流程图;
图4为本发明实施例提供的网络侧触发MTC UE随机接入的方法流程图;
图5为本发明实施例提供的MTC UE示意图;
图6为本发明实施例提供的另一种MTC UE结构图;
图7为本发明实施例提供触发MTC UE随机接入的网络侧设备示意图;
图8为本发明实施例提供的基站结构图。
具体实施方式
下面结合附图和实施例对本发明提供的MTC UE的随机接入的方法及装置进行更详细地说明。
在下面的说明过程中,先从网络侧和用户设备侧的配合实施进行说明,最后分别从网络侧与用户设备侧的实施进行说明,但这并不意味着二者必须配合实施,实际上,当网络侧与用户设备侧分开实施时,也解决了分别在网络侧、用户设备侧所存在的问题,只是二者结合使用时,会获得更好的技术效果。
本发明提供一种网络侧触发机器类型通信用户设备MTC UE随机接入的方法及MTC UE随机接入的方法,主要包括以下步骤:
步骤1,网络侧向MTC UE发送指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
网络侧触发UE发起非竞争随机接入过程中,网络侧为UE分配PRACH资源,本实施例中网络侧可以向MTC UE指示至少一个CE LEVEL及其对应的PRACH资源。
优选地,网络侧可以但不限于通过物理下行控制信道PDCCH命令(PDCCH order)向MTC UE发送指示信息。
网络侧的PDCCH order中包含协议约定的全集或部分子集的CE LEVEL及其对应的PRACH资源。
步骤2,MTC UE接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源。
优选地,MTC UE接收网络侧通过PDCCH order发送的指示信息。
步骤3,MTC UE从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;
UE可以根据当前自己的情况(例如RRM测量等)来判断UE当前所处的CE LEVEL,网络侧同时还指示了至少一个CE LEVEL的PRACH资源,UE可以按照一定机制从中选择一个CE LEVEL,并确定该CE LEVEL对应的PRACH资源。
步骤4,在选择的CE LEVEL对应的PRACH资源发起随机接入。
步骤5,网络侧接收MTC UE在选择的CE LEVEL对应的PRACH资源上发起的随机接入。
优选地,从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,采用如下机制选择一个CE LEVEL:
根据MTC UE当前所述MTC UE的CE LEVEL是否包含在网络侧指示的CE LEVEL中,确定选择的CE LEVEL
情况1,MTC UE确定当前所述MTC UE的CE LEVEL包含在网络侧指示的CE LEVEL 中
MTC UE选择所述MTC UE的CE LEVEL,根据所述MTC UE的CE LEVEL选择网络侧指示的该CE LEVEL对应的PRACH资源,在对应的PRACH资源发起非竞争随机接入CFRA过程。
情况2,MTC UE当前所述MTC UE的CE LEVEL未包含在网络侧指示的CE LEVEL中,则可以采用如下方法确定一个CE LEVEL:
1)MTC UE选择所述MTC UECE LEVEL,根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL的PRACH资源发起竞争随机接入CBRA过程;
2)MTC UE从网络侧指示的多个CE LEVEL中,选择一个覆盖增益最接近所述MTC UECE LEVEL的CE LEVEL,根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,在该PRACH资源发起CFRA;
不同的CE LEVEL对应的覆盖增益不同,选择的覆盖增益最接近所述MTC UE的CE LEVEL的CE LEVEL,可能比所述MTC UE的CE LEVEL覆盖增益好,也可能比所述MTC UE的CE LEVEL覆盖增益差。
进一步优选地,可以选择比所述MTC UE的CE LEVEL覆盖增益差且最接近所述MTC UECE LEVEL的CE LEVEL。
3)MTC UE根据所述MTC UE的CE LEVEL的覆盖增益高于或低于网络侧指示的CE LEVEL的情况,确定选择所述MTC UE的CE LEVEL还是选择网络侧指定的一个CE LEVEL。
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的所有的CE LEVEL时,选择所述MTC UE的CE LEVEL;根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源;或者
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的所有的CE LEVEL时,从网络侧指示的多个CE LEVEL中选择一个CE LEVEL;根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
下面给出网络侧采用不同的指示方式对应的PRACH资源选择方式优选实施方式。
1)网络侧通过PDCCH order指示协议约定的每个CE LEVEL及其对应的PRACH资源
由于网络侧指示所有CE LEVEL及其对应的PRACH资源,则MTC UE所述MTC UE的CE LEVEL一定包含在网络侧指示的CE LEVEL中,因此选择使用所述MTC UE的CE LEVEL。
根据所述MTC UE的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,在该PRACH资源上发送Msg1,并确定本次RACH过程的CE LEVEL的其他配置。
2)网络侧通过PDCCH order指示协议约定的多个CE LEVEL及其对应的PRACH资源
即网络侧指示的可能是所有CE LEVEL,也可能是部分CE LEVEL。
方法1,根据MTC UE所述MTC UE的CE LEVEL是否包含在网络侧指示的CE LEVEL中区别处理:
情况一,MTC UE所述MTC UE的CE LEVEL包含在网络侧指示的CE LEVEL中
MTC UE选择使用所述MTC UE的CE LEVEL;根据所述MTC UE的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,在该PRACH资源上发送Msg1,并确定本次RACH过程的CE LEVEL的其他配置。
情况二,MTC UE所述MTC UE的CE LEVEL未包含在网络侧指示的CE LEVEL中,则可以采用如下处理方式:
从网络侧指示的多个CE LEVEL中,选择一个覆盖增益最接近所述MTC UE的CE LEVEL的CE LEVEL;根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,在该PRACH资源上发送Msg1,并根据该CE LEVEL获知对应的该CE LEVEL的其他RACH相关配置。或者
在所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的所有的CE LEVEL时,选择所述MTC UE的CE LEVEL;根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源,在对应的PRACH资源发起竞争随机接入。或者
所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的所有的CE LEVEL时,从网络侧指示的多个CE LEVEL中选择一个CE LEVEL;根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。在该PRACH资源上发送Msg1,并根据该CE LEVEL获知对应的该CE LEVEL的其他RACH相关配置。优选地,可以选择覆盖增益最接近所述MTC UE的CE LEVEL的CE LEVEL。
3)网络侧通过PDCCH order指示协议约定的一个CE LEVEL及其对应的PRACH资源
情况一、在网络侧指示的一个CE LEVEL是所述MTC UE的CE LEVEL时,选择使用所述MTC UE的CE LEVEL;根据所述MTC UE的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,在该PRACH资源上发送Msg1,并确定本次RACH过程的CE LEVEL的其他配置。
情况二、在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL时,可以采用如下机制确定选择的CE LEVEL:
选择网络侧指示的CE LEVEL,网络侧指示的该CE LEVEL对应的PRACH资源,在该PRACH资源上发送Msg1,并确定本次RACH过程的CE LEVEL的其他配置。或者
所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的CE LEVEL时,选择网络侧指示的CE LEVEL,根据网络侧指示的该CE LEVEL对应的PRACH资源,在该PRACH资源上发送Msg1,并确定本次RACH过程的CE LEVEL的其他配置;或者
所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的CE LEVEL时,选择所述MTC UE的CE LEVEL,根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源,在PRACH资源发起竞争随机接入。
优选地,在选择的CE LEVEL对应的PRACH资源发起随机接入失败时,还包括:
自行跃迁到覆盖增益更高一级的CE LEVEL上;
确定跃迁的CE LEVEL的在网络侧指示的CE LEVEL中时,根据跃迁的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,并在该PRACH资源上发起非竞争随机接入,否则根据竞争随机接入资源选择机制选择PRACH资源,发起竞争随机接入。
优选地,网络侧发送的指示信息采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
方式1,指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
方式2,指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
方式3,指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
下面从终端侧,给出一种机器类通信用户设备MTC UE随机接入的方法,如图3所示,包括:
步骤301,接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
步骤302,从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;
步骤303,在选择的CE LEVEL对应的PRACH资源发起随机接入。
下面从网络侧,本发明还提供一种网络侧触发MTC UE随机接入的方法,如图4所示,包括:
步骤401,向MTC UE发送指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
步骤402,接收MTC UE在选择的CE LEVEL对应的PRACH资源上发起的随机接入。
下面给出本发明MTC UE随机接入方法的优选实施例。
实施例1
ENB发送的PDCCH order中携带协议约定的每个CE LEVEL及其对应的PRACH资源。
网络侧指示3个CE LEVEL及其对应的PRACH资源给UE,PDCCH order中携带每个CE LEVEL的PRACH mask index和preamble index;
UE根据当前测量获得当前CE LEVEL,根据该CE LEVEL得到对应的PRACH mask index和preamble,根据该信息进行RACH传输,并根据该CE LEVEL进行后续传输;
如果本次Preamble传输失败或达到最大尝试次数后仍然失败,UE自动跃迁到高一层的CE LEVEL,然后根据该CE LEVEL找到PDCCH order中给出的PRACH mask index和preamble index,发起非竞争随机接入过程CFRA过程。实施例2
ENB发送的PDCCH order中携带1个CE LEVEL的专用PRACH资源。
网络指示1个CE LEVEL的PRACH资源给UE;
UE根据网络配置的PRACH资源和对应的CE LEVEL发起CFRA;
如果本次Preamble传输失败或达到最大尝试次数后仍然失败,UE自动跃迁到高一层的CE LEVEL(也可以根据自己当前的真实CE LEVEL)发起竞争随机接入过程CBRA。
实施例3
ENB发送的PDCCH order中携带1个CE LEVEL的专用PRACH资源。
网络指示1个CE LEVEL的PRACH资源给UE;
UE当前的CE LEVEL好于网络指示的CE LEVEL,利用网络指示的CE LEVEL对应的PRACH资源发起CFRA。
实施例4
ENB发送的PDCCH order中携带1个CE LEVEL的专用PRACH资源。
网络指示1个CE LEVEL的PRACH资源给UE;
UE当前的CE LEVEL差于网络指示的CE LEVEL,根据UE自己当前的CE LEVEL发起CBRA。
实施例5
本实施例给出PDCCH order中指示多个CE LEVEL的指示方式,具体采用指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index,可以采用如下任一方法:
方法1
一种方式是给出每个PRACH MASK INDEX和preamble index组合对应的CE LEVEL, 可以是对应一个CE LEVEL,也可以是对应多个CE LEVEL。还有一种方式是给出一个CE LEVEL对应的PRACH MASK INDEX和preamble index组合,可以是一个组合,也可以是多个组合。
具体可以在PDCCH order的PDCCH DCI format中增加CE LEVEL字段,说明该PDCCH order中给定的PRACH Mask index和preamble index对应的是哪个CE LEVEL的还是几个CE LEVEL的;比如引入2个bit,如表2或表3所示。
表2
00 Level 0
01 Level 1
02 Level 2
03 Level 3
表3
00 Level 1
01 Level 2
02 Level 3
03 All
或引入多个bit的码点,增加对子集的表示方式,即多个bit的码点表示指示的CE LEVEL及其对应的preamble index和PRACH Mask index。该种方式下,当UE拿到该PDCCH order,则会根据指示的CE LEVEL对应的PRACH mask index,在现有标准的表格找到对应的PRACH资源。
方法2,增加PRACH Mask index的表格维度
即PRACH Mask index的表格包含CE LEVEL,该表格标识每个CE LEVEL对应的PRACH Mask index的表格中可用的PRACH Mask index取值。
例如将当前16个码点扩展为64个或48个,分别对应4个CE LEVEL(包含CE LEVEL0)或3个CE LEVEL(不包含CE LEVEL 0)的信息。
也可以做简化,即类似上述方法1,DCI format中的CE LEVEL的指示方式嵌入到mask index表格中,即在每个PRACH Mask index取值一项增加指示该PRACH Mask index和preamble index对应的是哪个CE LEVEL的还是几个CE LEVEL。
方法3,通过PRACH resource index隐式指示的方法
即当指示的PRACH resource index适用于哪几个CE LEVEL,则相关CE LEVEL的资源全都可以用于该UE进行CFRA使用。
本发明提供一种机器类通信用户设备MTC UE,如图5所示,包括:
接收单元501,用于接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
选择单元502,用于从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;
随机接入单元503,用于在选择的CE LEVEL对应的PRACH资源进行随机接入。
优选地,所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的CE LEVEL包含所述MTC UE的CE LEVEL时,选择所述MTC UE的CE LEVEL;
根据所述MTC UE的CE LEVEL选择网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示每个CE LEVEL及其对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL时,从网络侧指示的多个CE LEVEL中,选择一个覆盖增益最接近所述MTC UE的CE LEVEL的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的所有的CE LEVEL时,选择所述MTC UE的CE LEVEL;
根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的所有的CE LEVEL时,从网络侧指示的多个CE LEVEL中选择一个CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL时,选择网络侧指示的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的CE LEVEL时,选择网络侧指示的CE LEVEL;
根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
优选地,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的CE LEVEL时,选择所述MTC UE的CE LEVEL;
根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
优选地,随机接入单元在选择的CE LEVEL对应的PRACH资源进行随机接入失败时,还用于:
自行跃迁到覆盖增益更高一级的CE LEVEL上;
确定跃迁的CE LEVEL的在网络侧指示的CE LEVEL中时,根据跃迁的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,并在该PRACH资源上发起非竞争随机接入,否则根据竞争随机接入资源选择机制选择PRACH资源,发起竞争随机接入。
优选地,所述指示信息采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
本发明实施例还提供一种MTC UE,如图6所示,包括处理器600、收发机610和存储器620,其中:
处理器600,用于读取存储器620中的程序,执行下列过程:通过收发机610接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;在选择的CE LEVEL对应的PRACH资源通过收发机610进行随机接入;
收发机610,用于在处理器600的控制下接收和发送数据。
其中,在图6中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器600代表的一个或多个处理器和存储器620代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机610可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口630还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器600负责管理总线架构和通常的处理,存储器620可以存储处理器600在执行操作时所使用的数据。
本发明还提供一种触发MTC UE随机接入的网络侧设备,如图7所示,包括:
指示单元701,用于向MTC UE发送指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
接收单元702,用于接收MTC UE在选择的CE LEVEL对应的PRACH资源上发起的随机接入。
优选地,所述指示单元指示的指示信息用于指示协议约定的每个CE LEVEL及其对应的PRACH资源;或者
所述指示单元指示的指示信息用于指示协议约定的多个CE LEVEL及其对应的PRACH资源;或者
所述指示单元指示的指示信息用于指示协议约定的一个CE LEVEL及其对应的PRACH资源。
优选地,所述指示单元采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
本发明实施例还提供一种演进基站,如图8所示,包括处理器800、收发机810和存储器820,其中:
处理器800,用于读取存储器820中的程序,执行下列过程:通过收发机810向MTC UE发送指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;通过收发机810接收MTC UE在选择的CE LEVEL对应的PRACH资源上发起的随机接入;
收发机810,用于在处理器800的控制下接收和发送数据。
其中,在图8中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器800代表的一个或多个处理器和存储器820代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机810可以是多个元件,即包括发送机和收发机,提供用于在传输介质上与各种其他装置通信的单元。处理器800负责管理总线架构和通常的处理,存储器820可以存储处理器800在执行操作时所使用的数据。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例作出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (30)

  1. 一种机器类通信用户设备MTC UE随机接入的方法,其特征在于,包括:
    接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
    从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;
    在选择的CE LEVEL对应的PRACH资源进行随机接入。
  2. 如权利要求1所述的方法,其特征在于,接收网络侧发送的指示信息,具体包括:
    接收网络侧通过物理下行控制信道PDCCH命令发送的指示信息。
  3. 如权利要求1所述的方法,其特征在于,从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的CE LEVEL包含所述MTC UE的CE LEVEL时,选择所述MTC UE的CE LEVEL;
    根据所述MTC UE的CE LEVEL选择网络侧指示的该CE LEVEL对应的PRACH资源。
  4. 如权利要求1~3任一所述的方法,其特征在于,所述指示信息用于指示每个CE LEVEL及其对应的PRACH资源。
  5. 如权利要求1~3任一所述的方法,其特征在于,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
    从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL时,从网络侧指示的多个CE LEVEL中,选择一个覆盖增益最接近所述MTC UE的CE LEVEL的CE LEVEL;
    根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
  6. 如权利要求1~3任一所述的方法,其特征在于,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
    从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的所有的CE LEVEL时,选择所述MTC UE的CE LEVEL;
    根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
  7. 如权利要求1~3任一所述的方法,其特征在于,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
    从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的所有的CE LEVEL时,从网络侧指示的多个CE LEVEL中选择一个CE LEVEL;
    根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
  8. 如权利要求1~3任一所述的方法,其特征在于,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
    从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL时,选择网络侧指示的CE LEVEL;
    根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
  9. 如权利要求1~3任一所述的方法,其特征在于,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
    从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的CE LEVEL时,选择网络侧指示的CE LEVEL;
    根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
  10. 如权利要求1~3任一所述的方法,其特征在于,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
    从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的CE LEVEL时,选择所述MTC UE的CE LEVEL;
    根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
  11. 如权利要求1~3任一所述的方法,其特征在于,在选择的CE LEVEL对应的PRACH资源进行随机接入失败时,还包括:
    自行跃迁到覆盖增益更高一级的CE LEVEL上;
    确定跃迁的CE LEVEL的在网络侧指示的CE LEVEL中时,根据跃迁的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,并在该PRACH资源上发起非竞争随机接入,否则根据竞争随机接入资源选择机制选择PRACH资源,发起竞争随机接入。
  12. 如权利要求1~3任一所述的方法,其特征在于,所述指示信息采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
    指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
    指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
    指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
  13. 一种网络侧触发机器类通信用户设备MTC UE随机接入的方法,其特征在于,包括:
    向MTC UE发送指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
    接收MTC UE在选择的CE LEVEL对应的PRACH资源上发起的随机接入。
  14. 如权利要求13所述的方法,其特征在于,向MTC UE发送指示信息,具体包括:
    通过物理下行控制信道PDCCH命令向MTC UE发送指示信息。
  15. 如权利要求13所述的方法,其特征在于,
    所述指示信息用于指示协议约定的每个CE LEVEL及其对应的PRACH资源;或者
    所述指示信息用于指示协议约定的多个CE LEVEL及其对应的PRACH资源;或者
    所述指示信息用于指示协议约定的一个CE LEVEL及其对应的PRACH资源。
  16. 如权利要求13所述的方法,其特征在于,所述指示信息采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
    指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
    指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
    指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
  17. 一种机器类通信用户设备MTC UE,其特征在于,包括:
    接收单元,用于接收网络侧发送的指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
    选择单元,用于从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源;
    随机接入单元,用于在选择的CE LEVEL对应的PRACH资源进行随机接入。
  18. 如权利要求17所述的MTC UE,其特征在于,所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的CE LEVEL包含所述MTC UE的CE LEVEL时,选择所述MTC UE的CE LEVEL;
    根据所述MTC UE的CE LEVEL选择网络侧指示的该CE LEVEL对应的PRACH资源。
  19. 如权利要求17或18所述的MTC UE,其特征在于,所述指示信息用于指示每个CE LEVEL及其对应的PRACH资源。
  20. 如权利要求17或18所述的MTC UE,其特征在于,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
    所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL时,从网络侧指示的多个CE LEVEL中,选择一个覆盖增益最接近所述MTC UE的CE LEVEL的CE LEVEL;
    根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
  21. 如权利要求17或18所述的MTC UE,其特征在于,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
    所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的所有的CE LEVEL时,选择所述MTC UE的CE LEVEL;
    根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
  22. 如权利要求17或18所述的MTC UE,其特征在于,所述指示信息用于指示多个CE LEVEL及其对应的PRACH资源;
    所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的多个CE LEVEL未包含所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的所有的CE LEVEL时,从网络侧指示的多个CE LEVEL中选择一个CE LEVEL;
    根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
  23. 如权利要求17或18所述的MTC UE,其特征在于,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
    所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL时,选择网络侧指示的CE LEVEL;
    根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
  24. 如权利要求17或18所述的MTC UE,其特征在于,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
    所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益好于网络侧指示的CE LEVEL时,选择网络侧指示的CE LEVEL;
    根据选择的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源。
  25. 如权利要求17或18所述的MTC UE,其特征在于,所述指示信息用于指示一个CE LEVEL及其对应的PRACH资源;
    所述选择单元从所述MTC UE的CE LEVEL及网络侧指示的CE LEVEL中,选择一个CE LEVEL并确定该CE LEVEL对应的PRACH资源,具体包括:
    在网络侧指示的一个CE LEVEL不是所述MTC UE的CE LEVEL,且所述MTC UE的CE LEVEL的覆盖增益差于网络侧指示的CE LEVEL时,选择所述MTC UE的CE LEVEL;
    根据竞争随机接入资源选择机制,确定所述MTC UE的CE LEVEL对应的PRACH资源。
  26. 如权利要求17或18所述的MTC UE,其特征在于,随机接入单元在选择的CE LEVEL对应的PRACH资源进行随机接入失败时,还用于:
    自行跃迁到覆盖增益更高一级的CE LEVEL上;
    确定跃迁的CE LEVEL的在网络侧指示的CE LEVEL中时,根据跃迁的CE LEVEL确定网络侧指示的该CE LEVEL对应的PRACH资源,并在该PRACH资源上发起非竞争随机接入,否则根据竞争随机接入资源选择机制选择PRACH资源,发起竞争随机接入。
  27. 如权利要求17或18所述的MTC UE,其特征在于,所述指示信息采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
    指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
    指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
    指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE LEVEL对应的preamble index。
  28. 一种触发MTC UE随机接入的网络侧设备,其特征在于,包括:
    指示单元,用于向MTC UE发送指示信息,所述指示信息用于指示至少一个覆盖增强等级CE LEVEL及其对应的物理随机接入信道PRACH资源;
    接收单元,用于接收MTC UE在选择的CE LEVEL对应的PRACH资源上发起的随机接入。
  29. 如权利要求28所述的网络侧设备,其特征在于,
    所述指示单元指示的指示信息用于指示协议约定的每个CE LEVEL及其对应的PRACH资源;或者
    所述指示单元指示的指示信息用于指示协议约定的多个CE LEVEL及其对应的PRACH资源;或者
    所述指示单元指示的指示信息用于指示协议约定的一个CE LEVEL及其对应的PRACH资源。
  30. 如权利要求28所述的网络侧设备,其特征在于,所述指示单元采用如下任一方式指示各CE LEVEL及其对应的PRACH资源:
    指示各CE LEVEL的索引及其对应的前导码索引preamble index和PRACH mask索引PRACH mask index;
    指示各CE LEVEL及其对应的PRACH资源组合的组合索引,其中预先配置或协议约定的每个CE LEVEL及其对应的PRACH资源的组合,并预先配置或协议约定每个组合对应的组合索引;
    指示各CE LEVEL的索引及其对应的PRACH mask index,其中预先配置各个CE  LEVEL对应的preamble index。
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WO2019100254A1 (en) 2017-11-22 2019-05-31 Zte Corporation Co-existence of different random access resources and associations
KR20200100659A (ko) * 2017-11-22 2020-08-26 지티이 코포레이션 상이한 랜덤 액세스 자원 및 연관의 공존
EP3714656A4 (en) * 2017-11-22 2020-11-18 ZTE Corporation COEXISTENCE OF VARIOUS RANDOM ACCESS RESOURCES AND ASSOCIATIONS
KR102364108B1 (ko) * 2017-11-22 2022-02-18 지티이 코포레이션 상이한 랜덤 액세스 자원 및 연관의 공존
US11324053B2 (en) 2017-11-22 2022-05-03 Zte Corporation Co-existence of different random access resources and associations

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CN105101454A (zh) 2015-11-25
US20190174549A1 (en) 2019-06-06
KR102055657B1 (ko) 2019-12-13
US10660134B2 (en) 2020-05-19
EP3337276A1 (en) 2018-06-20
EP3337276A4 (en) 2018-08-01
JP2018523948A (ja) 2018-08-23
KR20180041706A (ko) 2018-04-24
CN105101454B (zh) 2019-02-01

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